Systems and Methods of Providing Multi-Homed Tandem Access

1. A private packet network backbone exchange (PPNBE) for delivering a call using multi-homed access, comprising: a private packet network; a logical call control entity, the logical call control entity coupled to the private packet network and to a single logical routing database, and the logical call control entity in signaling communication with a plurality of access exchanges and with an endpoint to which a call is to be delivered; an originating connection between the private packet network and each of the plurality of access exchanges; and a terminating connection between the private packet network and the endpoint, wherein: the endpoint is indicated by each Terminal Number (TN) in a set of TNs, each TN in the set of TNs corresponds to a respective LRN (Local Routing Number) in a set of LRNs, each LRN in the set of LRNs is homed to a respective access exchange of the plurality of access exchanges, the private packet network is configured to receive the call, the call including a selected TN from the set of TNs, a content of the call is received by the private packet network over a corresponding originating connection from a corresponding access exchange, and the private packet network is further configured to deliver, based on the selected TN and based on an indication from the logical call control entity in conjunction with the single logical routing database, the call from the corresponding originating connection to the terminating connection and the endpoint.

2. The PPNBE of claim 1 , further comprising a signaling connection enabling the logical call control entity to be in signaling communication with the plurality of access exchanges and with the endpoint.

3. The PPNBE of claim 2 , wherein the signaling connection is at least one of an SS7 signaling connection or an in-band signaling connection.

4. The PPNBE of claim 1 , wherein: the originating connection between the private packet network and each of the plurality of access exchanges includes a first end in connection with an originating private packet network gateway coupled to the private packet network, and a second end in connection with each of the plurality of access exchanges; and the terminating connection between the private packet network and the endpoint includes a first end in connection with a terminating private packet network gateway coupled to the private packet network, and a second end in connection with the endpoint.

5. The PPNBE of claim 4 , wherein the private packet network is configured to deliver the call from the originating private packet network gateway to the terminating private packet network gateway and the terminating connection.

6. The PPNBE of claim 1 , wherein at least one of the originating connection or the terminating connection supports at least one of a (Time Division Multiplexed) TDM or a VoIP (Voice over Internet Protocol) protocol.

7. The PPNBE of claim 1 , wherein the private packet network uses an Internet Protocol or a packet or cell switching technology.

8. The PPNBE of claim 1 , wherein the logical call control entity is configured to route, in conjunction with the single logical routing database and using the private packet network, the call content from any of the originating connections to the terminating connection.

9. The PPNBE of claim 1 , wherein each TN in the set of TNs corresponds to a different LRN.

10. A method of delivering a call to an endpoint, comprising: communicating a homing arrangement to a communications exchange, the homing arrangement including a mapping of each of a plurality of local routing numbers (LRNs) to a respective access exchange in a set of access exchanges; communicating an assignment arrangement to the communications exchange, the assignment arrangement including a mapping of each Terminating Number (TN) of a set of TNs to a respective LRN from the plurality of LRNs so that members of the set of TNs are distributed for routing purposes across the set of access exchanges; receiving a call from one access exchange of the set of access exchanges, including receiving the call from the one access exchange at an originating gateway coupled to a private packet network, the call including a selected TN from the set of TNs; and routing, based on the selected TN and based on an indication from a logical call control entity and a single logical routing database coupled to the private packet network, the call from the originating gateway using the private packet network to a terminating gateway and the endpoint.

11. The method of claim 10 , wherein communicating the homing arrangement comprises populating or overwriting at least a portion of a database with at least a portion of the homing arrangement.

12. The method of claim 10 , wherein communicating at least one of the homing arrangement or the assignment arrangement to the communications exchange comprises communicating the at least one of the homing arrangement or the assignment arrangement to a local exchange.

13. The method of claim 10 , wherein each TN of the set of TNs is mapped to a different LRN.

14. A method of delivering a call to an endpoint, comprising: coupling a communications exchange to each of a plurality of access exchanges, each of the plurality of access exchanges corresponding to a specific LRN (Local Routing Number) in a set of LRNs; causing a control entity to determine a set of terminating numbers (TNs), wherein each TN of the set of TNs indicates the endpoint and at least a portion of the TNs included in the set of TNs each corresponds to a specific LRN from the set of LRNs; receiving an originating call, the originating call including a selected TN from the set of TNs; and routing the originating call to a corresponding access exchange based on the selected TN.

15. The method of claim 14 , wherein coupling the communications exchange to each of the plurality of access exchanges comprises coupling the communications exchange to each of the plurality of access exchanges, the each of the plurality of access exchanges in connection with a private packet network backbone exchange (PPNBE), and the private packet network backbone exchange is in direct connection with the endpoint.

16. The method of claim 14 , wherein coupling the communications exchange comprises coupling a communications exchange enabled to provide a communications connection with a CPE (Customer Premises Equipment) by using at least one communications access technology selected from: a wired access technology, a wireless access technology, a VoIP (Voice over Internet Protocol) access technology, a cable telephony access technology, or a broadband access technology.

17. The method of claim 14 , further comprising populating or overwriting at least a portion of a routing database with a homing arrangement, the homing arrangement comprising a mapping of the plurality access exchanges to the set of LRNs.

18. The method of claim 14 , wherein determining the set of TNs comprises obtaining an assignment arrangement including a mapping of the set of TNs to the set of LRNs.

19. A method for accessing an endpoint using a multi-homed exchange, comprising: receiving an indication of an assignment of each TN included in a set of TNs to correspond to a specific local routing number (LRN) from a plurality of LRNs; receiving, at a computing device associated with a communications exchange, a call from one access exchange of a set of access exchanges, wherein: the call includes a Terminal Number (TN) that is selected from the set of TNs; each LRN of the plurality of LRNs is homed to a respective access exchange from the set of access exchanges; and each TN of the set of TNs corresponds to a common destination endpoint; and routing, by the computing device associated with the communications exchange and based on the TN and the respective LRN, the call to the common destination endpoint.

20. The method of claim 19 , further comprising coupling each access exchange in the set of access exchanges to a private packet network backbone exchange (PPNBE) and coupling the common destination endpoint to the PPNBE; and wherein routing the call to the common destination endpoint comprises routing the call from the one access exchange to the common destination endpoint using the PPNBE.

21. The method of claim 20 , wherein the PPNBE includes: a logical call control entity of the PPNBE in signaling communication with each of the set of access exchanges and with the common destination endpoint, and the logical call control entity coupled to a single logical routing database; and a private packet network coupled to the logical call control entity; wherein routing the call to the common destination endpoint using the PPNBE comprises routing, based on an indication from the logical call control entity operating in conjunction with the single logical routing database, a content of the call over the private packet network to the common destination endpoint.

22. The method of claim 19 , wherein receiving the call from the one access exchange of a set of access exchanges comprises: receiving one of a plurality of calls from the set of access exchanges, each call of the plurality of calls including a respective TN selected from the set of TNs and each TN included in the set of TNs being assigned to a respective LRN of the plurality of LRNs so that members of the set of TNs are distributed across the set of access exchanges.

23. The method of claim 19 , wherein each TN corresponds to a different specific LRN from the plurality of LRNs.